Pertanyaan

Jika diketahui f ( x ) = 7 x + 15 maka f − 1 ( x ) ...

Jika diketahui $f (x) = 7 x + 15 maka f^{- 1} (x) ...$

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A. Septianingsih

Master Teacher

Mahasiswa/Alumni Universitas Gadjah Mada

Jawaban terverifikasi

Pembahasan

$begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell straight f left parenthesis straight x right parenthesis end cell equals cell straight y equals 7 straight x plus 15 end cell row cell straight y minus 15 end cell equals cell 7 straight x end cell row cell fraction numerator straight y minus 15 over denominator 7 end fraction end cell equals straight x row blank blank blank row cell Jadi space straight f to the power of negative 1 end exponent left parenthesis straight x right parenthesis end cell equals cell fraction numerator straight x minus 15 over denominator 7 end fraction end cell end table end style$